Profile: Wold Engineering specializes in service and repairs on all agricultural harvesting machinery. Our push unloading trailer was built to deliver wood chip into stores where roof access is limited for conventional tipping trailers. The trailer has a hydraulic push headboard which discharges material in one operation. The grader removes the dust and smalls from the wood chip by means of a revolving drum. The drum is fitted with mesh screens, the first section removes the dust and smalls from the sample. The second section removes the size graded wood chip.